Switchboard system



(No Model.) 2 Sheets-Sheet 1 D. H. WILSON.

. SWITGHBOARD SYSTEM. No. 514,980. PatentedlebQ 20, 1894.

INVENTOR- A TTORNEY 2 Sheets-Sheet 2-.

(No Model.)

' D. H. WILSON.- SWITGHBOARD SYSTEM. N'0.'-: 5'1- 4, 98 0-. PatentedFeb. 20, 1894.

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NITED STATES PAT NT OFFICE.

DAVID H. WILSON, on CHICAGO, ILLINOIS.

SWITCHB'OARD SYSTEM.

SPECIFICATION forming part of Letters Patent No. 514,980, dated February20, 1894.

' Application filed September 8,1893. Serial No. 485,102.- (No model.)

To all whomit may concern.-

7 Be it known that 1, DAVID H. WILSON, a citizen of the United States,residing at Chicago, county of Cook, and State of Illinois, haveinvented a new and useful Improvement in Swltchboards, of which thefollowing is a specification.

My invention relates to switchboards for electric fence stations and hasfor its object the production of a switch board having'certain novelfeatures which are set forth in the following description.

By the term electric fence I mean a fence made of wires or strands ofsome conducting material connected with a battery or generator in such amanner that when an animal standing on the ground comes in contact withsuch conducting wires a circuit will be completed through the body ofthe animal, caus- Ing said animal to receive a shock.

Referring to the accompanying drawings: Figure l is a front View of theswitch board Fig. 2 is a diagram of the circuits of the switch board asseen from behind.

Like letters refer to like parts throughout. A is the switch boardproper to which are secured the telephone transmitter A, the telephonereceiver A the bell A the switches B", B, B 13 connected to the outgoingwires of the fence which in this case are four in number, and theswitches 13, B B, B connected to the incoming Wires of the fence.

B is a switch by which the system is grounded. I

Referring to Fig. 2, O is a generator which is connected by the wires Gto the binding posts D, D. I

O is a conductor leading from the binding post D to the switches B B B Band B 0 is a conductor leading from the binding postD through the coilof the electro-magnet G to the switches B, B, B B

0 is the armature of the electro-magnet 0 Wis a contact point againstwhich the armature G rests when said armature is attracted by the magnet0 O is abattery which works the bell A E is the telephone battery, theterminals of which are connected to the binding posts E E E is aconductor leading from the binding post E to the transmitter A.

E is the primary coil of an induction coil having one end connected tothe transmitter A and the other end connected to the contact plate E I Eisa wire leading. from the strip E back to the battery E.

E is the secondary coil of the induction coil having one end connectedto the contact plate E and the other end connected to the binding post EE is a conductor-leading from the strip E to the ground;

E is a conductor connecting the binding port E with the binding post D Eis a telephone receiver.

E is a lever upon which the telephone receiver is hung when not in use.I

E is a spring which tends to move the lever E away from the contactpoint E The contact plate of the switch B is connected by the Wire F tothe frame F of a telegraphic instrument which is representeddiagrammatically with its several parts detached so as to allow thedifferent circuits to be easily traced. The frame F is provided with theslots F F in which work the pins F F By this means the frame F can bemoved in or out of contact with the binding posts F F l is the key, Fthe electro-magnets and F the armature of the instrument.

F is a battery one pole of which is connected to the electro-magnetF andthe other pole grounded at F F is a contact point which is connected bythe wire F to the binding post F F is a strip by which the binding postsF and F are connected.

G is a wire connecting the wire F with the binding post D K, K K, &c.,are the contact plates of the different switches. The contact plates Kand K of the switches B and B are connected to the binding posts D and DThe contact plates K K K and K of the switches B B B and B are connectedto the binding posts D D D D Switch 13 is connected to binding post Dwhich is grounded by the plate H.

The outgoing wires of the fence are connected to the binding posts D D DD and the incoming wires to the binding posts. D D D D The first or topwire of the fence is connected to the binding posts D and D, the secondwire to the binding posts D and D", 850.

The use and operation of my invention are as follows: When theinstruments are in the position indicated in Fig. 2,the circuit throughthe generator G is open. If an animal standing on the ground touches anyof the wires of thefence the circuit will be completed through its bodyand it will receive a shock. When the circuit is completed, the magnet Cattracts the armature C and brings it in contact with the contact point0 This completes the circuit through the bell A and sounds the alarm.Suppose the animal touches the top wire of the fence the circuit will betraced as follows: from generator 0 to binding post D, thence to switchB, thence along wire F to the base F of the telegraph instrument, thencealong wire G to binding post D thence along the bottom wire of the fenceto the animal, thence to ground, thence to plate I-I, thence back to thegenerator.

The circuit around the second wire of the fence is as follows: fromgenerator 0 to binding post D, thence to switch B, thence to conductingpoint E thence along lever E thence along spring E to binding post Ethence by wire E to binding post D thence along the second wire of thefence to the animal, thence to ground, thence to plate H, thence tobinding post D thence back to the generator.

When it is desired to test the fence for breaks, the operation is asfollows. If it is desired to test the bottom wire, switch B is openedand switch B closed which completes the circuit through the generatorand the fourth or bottom wire of the fence if that wire is all right.The circuit will be traced as follows: from generator 0 'to binding postD, thence to switch B thence to binding post D thence along the bottomwire of the fence to binding post D, thence to switch B thence by wire 0back to the generator. If when the switch 13 is closed the bottom wireof the fence is not broken, the electro-magnet C will attract itsarmature and complete the circuit through the bell A and cause said bellto ring. If the bell does not ring the bottom wire of the fence isbroken. The third wire of the fence is tested in the same way by openingswitch B and closing switch B If when in this position the bell A ringsthe third wire is all right. The remaining wires of the fence are testedin the same manner, viz. by closing switches 13 and B"'.

If a person anywhere along the fence desires to talk to a person at thestation he grounds one wire of the hand telephone with which he isprovided and taps the fence with the other wire a certain number oftimes, the number being arranged between the two men.

This notifies the man in the station that he is wanted at the telephone.He then takes down the receiving telephone E. The spr1ng It" then movesthe lever E until said lever moves out of contact with the contact pointE and the strips E and E come in contact with the contact plates E andE. The current 1s then broken through the generator and completedthrough the transmitter A and Will be traced as follows: from battery Eto binding post 0', thence through wire to transmitter A, thence throughthe primary 0011 E thence through contact plate E, strip E and wire Eback to battery E. The circuit through the receiving telephone will betraced as follows: from secondary coil to binding post E thence throughthe receiving telephone E thence to binding post E thence by Wire F tobinding post D, thence along the fence wire to the hand telephone of theman along the fence, thence to ground, thence to plate I-I, thence tobinding postD thence along conductor E to strip E thence to contactplate E and thence back to the secondary coil E When the men ceasetalking the receiving telephone E is hung up again which breaks thecircuit through the rece1ving and transmitting telephone.

If it is desired to use the telegraph instrument the man along the fencewill g1ve the prearranged signal. The man at the station then moves thebase F of the telegraph 1nstrument in the direction of the arrow untilthe binding post F and F are connected by the strip F and the connectionbetween the base F and the binding post F is broken. When in thisposition the generator G is out of circuit and the battery F in circuitwith the instrument. The telegraph instru ment is now ready for use. Thecircuit will be traced as follows: from battery F through clectro magnetF thence to binding post F thence along strip F to binding post F thenceto key F, thence to contact polnt F (when the key is pressed down)thence along wire G to binding post D thence along fence wire tooperator, thence to ground, thence to plate F and thence back to thebattery F When the message has been completed the base F of thetelegraph instrument is moved to the position shown in Fig. 2 whichbreaks the circuit through the telegraph instrument and puts thegenerator 0 again in connection with the top wire of the fence.

If the top wire of the fence should be broken and fall on the ground soas to ground that wire it can be thrown out of circuit by opening switchB, without affecting the remaining wires. Any of the wires can be thrownout of circuit should they become grounded in the same manner, viz., byopening one of the switches B, B, B B corresponding to the groundedwire.

I claim- A switch board for an electric fence having thereon bindingposts and suitable connec tions for the fence wire and the generator, a

tact with said lever, a telegraphtinstrument having a movable base, astrip attached to said base, contact points in proximity to said strip,a third contact point in proximity to [0 said base, and suitableconnections whereby when the said telephone and telegraph instrumentsare connected to the fence wires, the connection of said wires with thegenerator is automatically broken, substantially as described.

DAVID E. WILSON.

Witnesses:

FRANCIS W. PARKER, WALTER J. GUNTHORP;

